News at 5, 9 and 11 Don’t look for Toni Sene cal on Ch. 11 next week – be cause she won’t be there. The “Toni On!” host leaves today for Costa Rica, along with hubby Tracy Shea, to shoot one of her half-hour “Toni On!” travel programs.

Toni returns Aug. 14, hope fully with lots of nature foot age from Costa Rica that will air later this year on Ch. 11’s 10 p.m. newscast.

A little lower on the dial, Ch. 9’s Brenda Blackmon hosts a panel discussion to morrow at the Schomberg Center with the stars of Dis ney Channel’s “That’s So Raven” to conclude Ebony magazine’s Hollywood In Harlem Film Festival.

Ch. 9’s sister sta tion, Ch. 5 – and its morning franchise, “Good Day New York” – had a terrific July. According to just-re leased numbers, “GDNY” (Jodi Applegate, Chris Gai lus) beat “Good Morning America” to finish second in the adults 18-49 demo which, as we know by now is – re peat after me – advertiser- coveted.

Last, but not least: * The second episode of Steven Bochco’s Iraq war drama, “Over There,” aver aged 2.6 million viewers Wednesday on FX – a 37 percent dropoff (in viewers) from its premiere (4.1 million viewers).

* Nick Perito, Perry Como’s arranger/conductor for many years, died Wednes day at the age of 81. He worked with many luminaries over the years (Ray Charles, Steve Lawrence and Eydie Gorme) – and had recently worked with Regis Philbin in Las Vegas.